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MCP1653 Datasheet(PDF) 5 Page - Microchip Technology |
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MCP1653 Datasheet(HTML) 5 Page - Microchip Technology |
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5 / 30 page  2004-2013 Microchip Technology Inc. DS21876B-page 5 MCP1650/51/52/53 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † VIN TO GND........................................................... 6.0V CS,FB,LBI,LBO,SHDN,PG,EXT ............ GND – 0.3V to VIN + 0.3V Current at EXT pin ................................................ ±1A Storage temperature .......................... -65°C to +150°C Operating Junction Temperature........ -40°C to +125°C ESD protection on all pins 4kV HBM † Notice: Stresses above those listed under “Maximum Rat- ings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Expo- sure to maximum rating conditions for extended periods may affect device reliability. DC CHARACTERISTICS Electrical Specifications: Unless otherwise noted, all parameters apply at VIN = +2.7V to +5.5V, SHDN =High, TJ = -40°C to +125°C. Typical values apply for VIN = 3.3V, TA +25°C. Parameters Sym Min Typ Max Units Conditions Input Characteristics Supply Voltage VIN 2.7 — 5.5 V Undervoltage Lockout (S Option) UVLO 2.4 2.55 2.7 V VIN rising edge Under Voltage Lockout (R Option) UVLO 1.85 2.0 2.15 V VIN rising edge Undervoltage Hysteresis UVLOHYST —117 — mV Shutdown Supply Current ISHD — 0.001 1 µA SHDN = GND Quiescent Supply Current IQ — 120 220 µA EXT = Open Soft Start Time TSS —500 — µs Feedback Characteristics Feedback Voltage VFB 1.18 1.22 1.26 V All conditions Feedback Comparator Hysteresis VHYS —12 23 mV Feedback Input Bias Current IFBlk -50 — 50 nA VFB < 1.3V Current Sense Input Current Sense Threshold ISNS-TH 75 114 155 mV Delay from Current Sense to Output Tdly_ISNS —80 — ns Ext Drive EXT Driver ON Resistance (High Side) RHIGH —8 18 EXT Driver ON Resistance (Low Side) RLOW —4 12 Oscillator Characteristics Switching Frequency FOSC 650 750 850 kHz Low Duty Cycle Switch-Over Voltage VLowDuty —3.8 — V VIN rising edge Duty Cycle Switch Voltage Hysteresis DCHyst —92 — mV Low Duty Cycle DCLOW 50 56 62 % High Duty Cycle DCHIGH 72 80 88 % |
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